By default the root login is disabled by ubuntu and all other debian based distro’s of Linux. bypassing it is possible but it is highly discouraged by Ubuntu creators! so the tool which is available for you is “sudo” which launches your commands as root! but what if you want to get into root shell!… Continue reading Become root in Ubuntu
Linux Screen Application
Sometimes you have to use SSH to get some jobs done in Linux! So what if you need to run multiple applications under SSH? Well the first solution is to open multiple SSH connections. Screen can make your life easier by letting you to have multiple windows on a single SSH session! But it’s not… Continue reading Linux Screen Application
Change SSH Port
Changing default SSH port can be one of the steps to improve security in Linux servers. By changing SSH port to something other than port 22 and using a proper firewall you may have a good result on minimizing brute-force attacks to SSH. To change SSH listening port you are required to edit /etc/ssh/sshd_config file.… Continue reading Change SSH Port
Completely disable email on single cPanel Account
A week ago one of our clients account been compromised and the attacker used the server to blast emails. as a system administrator my task was to prevent any outgoing email from the account before I start to investigate the attack and remove any kind of scripts from the hosting account. Studying cPanel files made… Continue reading Completely disable email on single cPanel Account
Send mail test from SSH on cPanel server
To check whether the mail server is working properly in a cPanel server which is running Exim mail server from SSH you can use sendmail script which is located in /usr/lib/sendmail. run the command following with –v emailaddress switch! for example: /usr/lib/sendmail –v [email protected] [email protected] is the recepient email here! once you press enter the… Continue reading Send mail test from SSH on cPanel server